Photographic shutter.



J. GODDARD. PHOTOGEAPHIC SHUTTER.

APPLICATION FILED JULY 11,1913.

Patented Mar. 10, 191i nl ll II/ b UNITED STATES PATENT JOSEPH GODDARD,OF ROCHESTER, NEW YORK, ASSIGNOB TO SENECA CAMERA MAIN U FACTURINGCOMPANY, OF ROCHESTER, NEW YORK, A CORPORATION OF NEW YORK;

PHOTOGRAPHIC SHUTTER.

To all tchom it may concern:

7 Be it known that I, JosEPH GODDARD, a

citizen of the United States, residing at.

Rochester, in the county of Monroe and State of New York, have inventednew and useful Improvements in Photographic Shutters, of which thefollowing is a specification.

This invention relates to improvements in photographic shutters of thetype adapted for use on cameras for the purpose of con-- trolling theexposures, and the primary object of the invention is to provide animproved shutter whereby rebound of the exposure-controlling memberthereof upon termination of instantaneous exposures is. prevented, theinvention 1n its preferred em- 'bodnnent 1IlV0lV1I1g rebound checkswhich operate automatically, irrespective of the direction of movementof the shutter, and co-' operate with and are released by theshutter-operating member when the latter is actuated to make anexposure. I I

To these and other ends, the invention consists in certain improvements,and combinations and arrangements of parts, all as will be hereinaftermore fully described, the novel features being pointed out particularlyin the claims at the end of the specification. In the accompanyingdrawing: Figure 1 is a perspective view of a photographic" shutterconstructed in accordance with the pres.- ent invention, theexposure-controlling memher being shown in position to make a timeexposure; Fig. 2 is a view similar to Fig; 1

showing the shutter in closed position a making a time exposure; Fig. 3shows the shutter set for making an instantaneous exposure; Fig. 4represents a transverse section through the shutter.

Similar parts are designated by the .same reference characters in theseveral views.

In the photographic art, it is common .to employ a shutter forcontrolling the passage of light through the lens of the camera and tothe sensitized medium. One type of shutter embodies anexposure-controlling member actuated by a spring which carries anexposing aperture in the exposure-controlling member rapidly past thelens opening, the -movement of the exposure-controlling member beingarrested suddenly and upon termination of the exposure by a stop. Ex-

perience, however, 'has shown that in making l J Specification ofLetters Patent. Patented Ma 10, 1914p,

I Application filed July 11,1913. Serial No. 778,611.

rapid exposures of this kind and which are termed instantaneousexposures, the exposure-controlling member has a tendency to rebound orrecoil upon striking the arresting stop, frequently causing the exposingaperture in the exposure-controlling member to again uncover the lensaperture and thereby produce over-exposure of the sensitized medlum.This objection is obviated by the present invention, and in thepreferred embodiment of the-invention, the means which prevents suchrebound operates automatically without requiring setting or other attention fromthe operator, and in applying the invention to shutters ofthe type wherein the exposure-controlling member shifts a1- ternately inreverse directions in making instantaneous exposures, the non-reboundchecks act automatically and .are controlled by the shutter-actuatingmember.

The invention is shown in the accompanying drawing as applied to ashutter of the type employing an oscillating disk. It will beunderstood, however, that the invention is not restricted necessarily toa shutter of the particular type shown, nor is it limited to thespecific construction shown, as equivalent constructions may be used andwill be present instance, is composed of a disk mounted to oscillate.about a pivot or axis 5, this member having an' exposing aperture 6which is adapted tomove past or to be brought into register with thelens aperture 3 in making instantaneous or time ex-- posures. A pair ofstops 7 and8 are provided, and the member 4 is provided with aprojection 9 which is adaptedto operate in an arc between the stops, thelens aperture being closed or covered when the projection 9 restsagainst one of the stops and being open when the projection 9 occupies aposition approximately midway between the stops. When the projection 9occupies the latter position, the shutter is in condltion to make a timeexposure, and in order to hold the shutter in such position, a timeexposure-controlling stop 10 is provided, that shown being in the formof a slide which is guided to operate longitudinally on pins 11 and isprovided with a projection 11 which clear of the path of the projection9 and the shutter may then oscillate without obstruction in a manner tocarry the exposing aperture therein rapidly past the lens aperture.

The shutter is actuated by a member 12, preferably in the form of alever, pivoted at 13 to the camera front, and a bow spring '14 forms anoperative connection between a pin 15 on the inner end of the lever 12and which shifts across the axis 5 of the shutter disk, and a pin 16which is attached to the shutter disk. This spring 14 has a tendency tostraighten or expand, and by shifting the lever 12 from one positioninto a reverse position, the pin 15 will be brought into such a positionrelative to the pin 16 on the shutter disk as to cause the shutter disk.

to reverse its'position, the projection 9 moving from, for example, thestop 7, to the stop 8, and the exposing aperture in the shutter diskmoving past the lens aperture, thereby effecting an instantaneousexposure. The next exposure is made by shifting the lever 12 into areverse position which causes the spring 14 to act in a reversedirection on the shutter disk and thereby move the shutter disk in adirection to carrytheprojection 9 thereon from the stop 8 to the stop 7.

The movement of the actuating lever 12 from one position to another islimited by a pair of stops 17 and 18 which are arranged in the presentinstance to cooperate alternately with a pair of arms 19 and 20 whichlatter extend in opposite directions from the lever 12. This lever 12has a portion. which projects outwardly beyond its pivot 13 and providesa handle whereby it may be manipulated easily.

In order to prevent rebound of the shutter upon termination of eachinstantaneous exposure, due to the striking of the projection 9 upon oneor another of the stops 7 and 8, the present invention provides reboundchecks. In the present embodiment of the invention, a pair of thesechecks is provided for the reason that the-exposing member is shiftedalternately in opposite directions in making successive exposures. Inthe construction shown, these rebound checks consist of a pair oftongues or lips 21 and 22 which are preferably struck from the metalcomposing the exposure-controlling disk and are bent laterally so astoproject in oppositely inclined directions from the face of the disk, andthe arms 19 and 20 of the lever 12 are formed with dogs 23 and 24, oneof which projects over the disk and into the path of the appropriatetongue 21 or 22 when the lever is moved into one or the other of its twoactuated positions. The tongues 21 and 22 have a yield or resiliencewhich causes them to deflect laterally as they pass beneath therespective dogs on the lever 12, and when the shutter reaches the limitof its movement in either direction, the free end of the respectivetongue abuts as-a shoul der against the corresponding dog on the lever12, thereby locking the shutter disk from backward movement'due to therecoil produced by the striking of .the projection 9 against the stop 7or the stop 8 as the case may be, these tongues on the shutter acting ineliect as latches which, however, are unlocked-automatically when theactuating lever 12 is shifted into a position to effect the nextsucceeding exposure. Assumin'g, for example, that the shutter occupiesthe position shown in Fig. 3, the tongue 22 on the shutter will then beheld by thedog 24. The next exposure is made by shifting the lever 12,vinto a reverse posit-ion, as shown in Fig. 2, this shifting of the actuating'1ever12 moving the dog 24 thereon out of the path of the tongue22 whereby the shutter disk is unlocked and capable of moving in a.reverse direction, and the reverse position ofthe lever 12 causes thespring 14 v to act upon the shutter disk in a manner to reflect areverse motion thereof whereby the exposing aperture therein is carriedrapidly past the lens aperture making the exposure, and the projection 9on the shutter disk strikes the stop 8 whereby the movement of theshutter disk is arrested. When the actuating lever 12. of the shutter isshifted to make this exposure, not only is the dog 24.

thereon carried into a position to release the tongue .22, but thedog'23 on the lever 12 is brought into a position to cooperate withthe-tongue 21, and immediately prior to the striking of the projection 9against the stop 8, the tongue 21 passes the dog 23 and the lattercooperates with the freeend of this tongue to lock the shutter disk,thereby preventing rebound of the shutter disk. The same operation takesplace when the lever 12 is shifted into a reverse position to eflect thenext exposure, and this lever 12 automatically unlocks the shutter diskwhen 1t 1s desired to make a time exposure, the time exposure beingcommenced by shifting the lever 12 in one direction whereby the stop 9on the disk is brought against the st-o 10, and this exposure isterminated by shi ting the lever 12back to its original position,

whereupon the shutter returns to closed position.

From-the foregoing it will be observed that rebounding of the shutterdisk is prevented by means which are relatively simple and which do notrequire the attention of the operator, the rebound checks operatingautomatically and being controlled by the member which actuates theshutter.

I claim as my invention 1. In a photographic shutter, the combination ofan exposing member, an actuating and releasing member therefor, andmeans controlled by the latter for preventing rebound of the former upontermination of an exposure.

2. In a photographic shutter, the combination of an exposing member, anactuating member therefor, and means for preventing rebound of saidexposing member embodying a latch on one of the members, and acooperative dog on the other member.

3. In a photographic shutter, the combination of an exposing membercapable of movement in reverse directions, an operating member movableinto positions to move the exposing member in reverse ,directions, andmeans for preventing rebound of the exposing member upon terminationofexposing movement thereof, said-means being operative to prevent reversemovement of l the exposing member and releasable by said operatingmember to permit such movement.

4.-. In a photographic shutter, the combination of an exposing membercapable of movement in reverse 'directions, an operating member movableintopositions to move the exposing member in reverse directions, andmeans for preventing rebound of the exposing member upon termination ofexposing movement thereof, embodying a pair of reversely arrangedlatches on one member, and a pair of dogs on the other member.

5. In a photographic shutter, the combination of an exposure-controllingmember capable of movement alternately in reverse directions, stops forlimiting the movement of said member in each direction, an operatingmember cooperative with said exposure-controlling member and capable ofoccupying reverse positions, and means on said members set in operativecondition byaid operating member for preventing rebound of theexposure-controlling member upon completion of its movement in eachdirection.

6. In a photographic shutter, the combination of an exposure-controllingdisk capable of oscillation alternately in reverse directions, stops forarresting the oscillation of the disk in each direction, an operatingmember cooperative with said disk and adapted to be set in reversepositions to cause exposing movement of the disk, and means on said diskand member operative automatically to prevent reverse movement of thedisk When arrested by one of its stops and permitting such reversemovement when said operating member is set in a reverse position.

7 In a photographic shutter, the combina tion of an apertured exposingmember capable of movement alternately in reverse directions, anoperating member therefor adapted to be set in reverse positions tocause exposing movement of the exposing member, reversely arrangedlatches 011 one of said members, and dogs on the other member, each dogadapted to cooperate with one of said'latches to automatically preventreverse movement of the exposing member and to release such latch whenthe operating member is set in a reverse position.

8. In a photographic shutter, the combination ofan apert-ured exposingmember having a yieldable lip struck therefrom, an operating member forthe exposing member, and a dog on said operating member cooperative withsaid lip to prevent rebound of the exposing member upon completion of anexposure.

9. In a photographic shutter, the combination of an aperturedexposure-controlling disk oscillatory in reverse directions and carryingreversely arranged latches, and an operating member therefor capable ofbeing set in reverse positions and carrying a pair of dogs arranged tocooperate alternately with the respective latches when the operat ingmember is set in its difierent positions.

In testimony whereof'I have hereunto set my hand in presence of twosubscribing witnesses.

Josnrn GODDARD.

Witnesses:

J. A. DYER, .N. A. BRANNIGAN.

